
/**
 * 获取浏览器类型
 * @returns {string}
 */
export function browserType() {
	var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
	var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器
	var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
	var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;
	var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器 
	var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器
	var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器
	var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器
	if (isIE) {
		var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
		reIE.test(userAgent);
		var fIEVersion = parseFloat(RegExp["$1"]);
		if (fIEVersion == 7) return "IE7"
		else if (fIEVersion == 8) return "IE8";
		else if (fIEVersion == 9) return "IE9";
		else if (fIEVersion == 10) return "IE10";
		else return "IE7以下"//IE版本过低
	}
	if (isIE11) return 'IE11';
	if (isEdge) return "Edge";
	if (isFF) return "FF";
	if (isOpera) return "Opera";
	if (isSafari) return "Safari";
	if (isChrome) return "Chrome";
}